Improvement in weit-trimsvjers



. FFIGE.

ISAAC DUNHAM, OFBROOKTON, MASSACHUSETTS.

IMPROVEMENT IN WELT-TRIMMERS.

Specification forming part of Letters Patent No. 157,678, dated December15, 1874; application filed September 24, 1874.

To all whom it may concern:

Be it known that I, ISAAC A. DUNHAM, of Brockton, in the county ofPlymouth and State of Massachusetts, have invented certain new and.useful Improvements in Welt-Trimmers; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying drawing and to theletters of reference marked thereon, which form a part of thisspecification.

In the said drawing, Figures 1 and 2 are side elevations, and Fig. 3 anend elevation, of my improved implement. Fig. 4 shows the knife turnedback into a position for being ground.

My present invention is an improvement upon that patented by me onSeptember 22,

1857, subsequently reissued and extended; and consists in a novelconstruction and arrangement of the parts, whereby the knife is not onlyrendered capable of having a compound adjustment, viz., bothlongitudinally and toward and away from the guard, but is capable ofbeing turned back into a convenient position for being ground withoutremoval from the stock, while the guard is so formed that, as the nippleon its extreme end becomes worn, the same may be bent over and a newnipple swaged or formed thereon, the peculiar construction of the knifeand its compound movement enabling the knife to be readily adjusted toconform to the reconstructed nipple.

In the drawing, A denotes the stock, which is a wedge-shaped block ofmetal affixed to a handle, B. O is a guard attached to or forming partof the stock, the same having a small curved projection or nipple, a,formed thereon, the same being like that shown in my said patent. Thestock is formed with a throat or chip-passage, I), through it, the samebeing shown in Figs. 1, 2, and 3. D is the knife or cutter, which is athin plate of steel of asegmental or curved shape,-having its backcorresponding in curvature with that portion of the stock to which it isapplied. This knife has a curved slot, 0, formed through it, itscurvature being coincident with that of the back of the knife. d is aset-screw, which passes through the slot and into the stock A,

the head of the screw overlapping the edges of the slot and serving toconfine the knife firmly in position. By forming the guard O with a longshank e, as shown, should the nipple become worn out, the end of theguard may be bent over and a new nipple swaged or formed thereon, andthe knife, by the arrangement of its curved slot, may be moved downwardto correspond with the depression or shortening of the guard, and so asto maintain its true and relative position with respect to the guard andstock, while the same also allows the knife to be turned backward andheld in the position to be ground, all of which cannot be effected in mypatented implement, as the cutter was so formed and applied to the stockas to be capable of but a single adjustment, viz., either toward or awayfrom its guard, so that when the nipple becomes so worn as to be unfitfor use the whole implement becomes worthless.

By my peculiar construction of the parts of the new implement, a greatsaving of time and labor is effected in comparison to that involved inthe manufacture or production of my said patented one.

I would remark that the guard maybe made in a separate piece from thatof the stock and united thereto by a tongue, f, 011 the guard, and acorresponding groove, 9, in the stock, or vice versa, and have aset-screw, h, by which the guard may be moved laterally, so as to gageor adjust the knife to cut any desired thickness of shaving, the samebeing as shown in Fi 5; but in ordinary cases the stationary guard isall that is requisite.

I do not claim, broadly, combining a knife with its stock and guard insuch manner that the knife may be adjusted both vertically and towardand away from the guard, as I am aware that such has heretofore beenefiected by the employment of a separate mechanism for each adjustment.By my peculiar construction and arrangement a single mechanism or deviceeffects not only both of such adjustments, but also the additional oneof adjusting or holding the cutter in a convenient position for beingground or sharpened.

Havingdescribed myinveution,whatIclaim 1s 1. In a welt-trimmer,substantially as described, the combination, with the stock A and guardO, of the segmental knife or cutter D, when provided with the concentricslot 0 and set-screw d, arranged as specified, whereby, by simplyturning the latter, the cutter may not only be adjusted vertically andlaterally with respect to the guard, but also adjusted and held in aconvenient position for being sharpened, as shown and described.

2. A Welt-trimmer consisting of the stock A, the curved segmental knifeor cutter D, provided with the concentric slot 0 and setscrew d, and thelipped guard G, projecting over the point of the cutter, and adjustableat right angles to the plane of its cutting-edge, the whole beingarranged and combined together in manner as shown and described.

In testimony that I claim the foregoing as my own invention I affix mysignature in presence of two witnesses.

ISAAC A. DUN HAM.

Witnesses:

F. P. HALE, F. O. HALE.

